Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F405xx_v2/USB_OTGHS_HOST/HFNUM#0x0
OTGHS host frame number/frame time remaining register (OTGHS_HFNUM)
Frame number
Frame time remaining
https://github.com/cmsis-svd/cmsis-svd-data